Filter.



K. KIEPER.

FILTER. APPLICATION FILED APR. 16, 1908. BBHEWBD FEB. 33, 1911.

' Patented May 30, 1911.

Witnesses.

-W i w' following is a specification.

KARL KIEFER, 0F CINCINNATI, OHIO.

FILTER.

Specification of Letters Patent.

Patented May 30, 1911.

Application filed April 1c, 1905, Serial No. 311,972. Renewed February 23, 1911. Serial No. 610,387.

'zen of the United States, and resident of.

Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Filters, of which the This invention pertains to filters in which compressed pulp in a semi molst cond1t1on isused, the moisture resulting from the packing of the filter plates shortly before using.

The expression compressed pulp is used here as in the art commonly to specify such moist pulp in contra-distinction to any dried paper manufacture. V

The object of my invention is to simplify such filters and especially to produce liquid conductors of extreme strength, simplicity and efficiency, showing other important advantages specified below.

The invention is illustrated in the accompanying drawings, of which- Figure 1 is a cross section through the filter construction containing inlet liquid conductors in combination; Fig. 2 shows a partial top view upon one of the inlet liquid conductors; Fig. 3 shows a vertical cross section of the filter construction containing modifications of the invention in combina tion; Fig. 4 shows a detail cross section in combination with filter mass through one of the improved liquid conductors.

My improved liquid conductors are characteristic in that they are not woven structures, but at the same time their construction allows of milling, and therefore, cheap manufacture. Some of them are characterizedby the combination of two systems of parallel channels or grooves that stand perpendicular to each other when in use. As most filters, for ObVlOllS reasons, are constructed circular with circular filtering layers, it is necessary that the liquid to be drained should be distributed at a circular woven liquid conductors, for instance as shown in Figs. 1 and 4 in detail.

A is an outlet liquid conductor, having a series of parallel channels of square construction perpendicular to a second similar series. Such a liquid conductor may be produced b milling into a sheet metal disk a. series 0 parallel slots 1, Fig. 4, of preferably rectangular cross section, and of slightly more than one half the depth of the metal sheet, and by milling a second series 2 Fig. 4, atright angles on the other side of this disk. The most important part is the size of these slots. T have found in the course of my experiments, that these slots, as shown in Fig. 4 when not made any larger than 1/16" in diameter become fiber retaining to dissolved pulp as it is used in building up filter layers in a packing machine or in some filters, to as gre at a degree as fine screens, and'show at the same time the advantage of not having any actual holes to be cleaned. The square holes that are formed by the meeting of the two perpendicular slots are of no height whatever, and by brushing in the direction cf both systems of channels, these liquid conductors are cleansed at once. proved liquid conductor will conduct liquid from one point to any other point wanted like the castles on a chess board; everytield of the liquid conductor is accessible by the liquid particles.

The inlet conductors in Fig. 1 are of some. what different construction, and are marked by the reference letter B. They are different from the outlet liquid conductors A in that the grooves are not milled into the metal sheet toa depth as great as above described, leaving a solid in'ipervions part between the two series of slots, shown in cross section in Fig. 5. This lends additional strength to the conductors, especially of advantage, when they are used as supports for the filter elements, as shown in my patent No. 812,932.

I have discovered that absolute universal comluclivitv is not required in the-inlet conductor. As shown in my Patent No. 812,932, the cloudy liquid ascends between the drum It is evident that this ima C and the filter elements and can enter at slots communicating with all points of the conductor consisting of a disk having two filter layer. In fact, it is not-necessary that the two series of slots should stand at right angles to each other for inlet conductors; and I have shown in Fig. 31inletliquidconductors D in whichrall the slots are parallel .to each other. Fig. Qshows a partial view upon-these inlet liquid conductors B and. D.' My system of two series f c'api-llary slots at: right angles, may however, be applied to. other structures.

to'secure by Letters Patent is'z fe- 1. In a filter, the combination with filter What I'claim its-m ihvention, and desire] layers of compressed moistpulp, of anon-- Woven, i'mperfora'te liquid conductor of a single-manufacture between themrand direct contact with the fibers of said pulp,

with means for the admission 01": the cloudy.

liquid and for conductingtheiclear liquid away. a t

2. In a filterythe combination with"-filter layers of compressedmoist pulp, in direct,

contact with the fibers thereof a liquid conductor consisting :of a single, non-woven manufacture conducting liquid in all directions, means for: the admission of cloudy liquid and for conducting the clear liquid- 1 W y 3. As a new article of Inanu fact'ure, a liquid conductor in combination,- consist-4 'ing of a single disk having parallel slots of a width to be fiber retaining for moist pulp,

and means for the admission of cloudy liquid and for conducting'the clear, liquid away.

l. In afil'ter', the combination-with filter layers of compressed moist pulp, a-liquid relatively perpendicular series of slots, one

on each side and of a width to be fiber-retaining for moist pulp with means for the admission of the cloudy liquid and for conducting the clear liquid away.

5. In a filter, the combination with filter layers of compressed moist pulp, of a fiberretaining liquid conductor consisting of a metal sheet containing fiber-retaining openings produced by crossing two parallel se ries of slots. with means for the admission of cloudy liquid and ior conducting the clear liquid away.

layers of compressed moist pulp, and in direct contact with the fibers thereof liquid conductor consisting of an iniperforate their having two relatively perpendicular series of slots, one on each side, with means for eespiso the admission of cloudy liquid; and forcong i ductingtlie clear liquid away. I

8; ln avfilter, the combination-with filter layers of compressed moist; pulp, -of a fiber-' retaining liquid conductor consisting of an imperfo'rate disk containing. fiber-retaining- .openings produced by' cro ssing two parallel.

seriesof slots with means for theadmission:

of cloudy liquid and for conducting". the

9. As ainew, article otmanufacturain combination with filter layers ofcompressed clear liquid away.-

moist pulp,"a' series of longitudinal strand's I spaced apart indirect contact with the fibers thereof, another series at right angles; and above the first series,- each series-forming longitudinal channels bet-weenthe strands,

and each in contact with a different :filter layer. 10'. As 'a new'article of manufacture, in

combination with filter layers ofcompressed moist'pulp,.'and in direct contactcwith the fibers thereof a. substantially'thin and fiat i disk having slots in its surfacenot, substantially wider than one-eighth of an inch. 7

' 11. As a new article of manufacture, in

combination, with filterlaye'rs of compressed moistpulp, a substantially thin and fiat disk, having slots onboth of its sides, said slots not substantiallywider than one-eighth oi; an inch, in direct Contact With the fibers;

of said pulp.

12. As a new tially' thin and flat disk having slots its surface not substantially wider than one eighth of an inch.

v article of manufacture, in combination with filter layers, a substan-.-

13. As a new article of manufacture, in

combination with filter layers, a substantially thin and fiat disk having slotson both its sides, said slots not substantially wider I than one-eighth of an inchg 14. In afilter, in combination w1th'a casing, a series of filter layers, 'twoof each being interlaced at their periphery in an. annular area by liquid conductors consisting of sin.- y

gle disks having parallel slots in their sides.

l5.' In a filter, in combination 'wlth a cas-f ing, a series of filter layers, two of each be ing interlaced in an annular area and separated exceptatsuch annular area by liquid conductors consistingof single disks having parallel slotsin their sides. v

16. in a filter, in combination. with a casing, a series of filter layers, pairs of which are interlaced in an annular peripheral area, and an inlet liquid conductor entirely separating this pair from another neighboring pair, said inlet liquid-conductors consisting of disks having slots in each side.

17. In a filter, in combination with an inclosing drum, a series of filter layers of freshly compressed pulp, with inlet liquid conductors consisting of disks having slots 110 area, and separated except at such annular in their sides, and a central compression In testimony whereof I have signed my hub. name to this specification in the presence of 18. In a filter, in combination with en two subscribing witnesses. inclosi-ng drum, a series of filter layers of KARL KIEFE'R. 5 freshly compressed tpulp with liquid con- "Witnesses:

ductors consisting 0 (118118 having slots in G. W. WERDEN, their sides. :ind a central pompresslon hub. E. J. APILETON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents.

Washington, D. O. 

